I Set A Post As "Sticky" And It Doesn't Stick My Post

I've been trying for the past hour, trying to figure out why my post isn't shown as a sticky post. Sorry for the bad explanation.
I am using the theme, Mystique. I followed the steps of making a post a sticky post, but for some odd reason, it doesn't seem to work. I have tried redoing it over and over but nothing seems to work.

Is anybody willing to help? I'm just a teen trying to get my website to run properly.
Thanks, Dararith